Ore-cooler.



F. LAIST.

ORE COOLER.

APPLICATION FILED NOV. 8, 1913. 1,090,549. Patented Mar. 17, 1914.

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WI IWZE'SSES:

INVEJVTOR.

3 ATTORNEY.

COLUMBIA PLANOGRAPH C0,, WASHINGTON. D- c.

F. LAIST.

ORE COOLER.

APPLICATION FILED nov. a, 1913 Patented Mar. 17, 1914.

2 SHEETS-SHEET 2.

WITNESSES.- IJVVEJVTOR 1 W mam/f 42254- ATTORNE I".

COLUMBIA PLANOOIAPH c0, WASHINGTON. D :4

SAES

I; FTQE.

FREDERICK LAIST, OF ANACONDA, MONTANA.

ORE-COOLER.

Specification of Letters Patent.

Patented Mar. 17, rem.

To all whom it may concern Be it known that I, Fanonnron LAIST, citizenof the United States, residing at Anaconda, in the county of Deerlodgeand State of Montana, have invented certain new and useful Improvementsin Ore-COOL ers, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings, forming apart hereof.

My invention has relation to improvements in rotary ore coolers; and itconsists in the novel features of construction more fully set forth inthe specification and pointed out in the claims.

In the drawings, Figural is a part side elevation and part longitudinalvertical section of my improved cooler; Fig. 2 is a longitudinal middlesection enlarged, of the feed end of the cooler; Fig.8 is a verticalcross-section on the line33 of Fig. 2; Fig. i is a verticalcross-section on the line 4t-4tof Fig. :2 taken through the water-headat the feed end of the cooler; and Fig. 5 is an end view looking at thedischarge end, and a cross-section of the piping on the line 55 ofFig. 1. a

The present invention relates to that type of'orecoolers-in which thehot ore or calcine from the roasting furnaces is cooled (preparatory toleaching) in a rotating tube or barrel, the ore passing through the tubein one direction, while the cooling medium (water as a rule) circulatesthrough the cooler in the opposite direction. This type of cooler isgenerally constructed of a; tubular shell traversed by the hot ore, the

water circulating through pipes on the inside of the shell, the pipesterminating in annular chambers or heads to which they are directlyconnected.

Obviously, the greatest changes of temperature are undergone by theshell, and it is one of the objects of my invention toallow said shellto freely expand and contract undervariations of temperature, withoutproducing a strain on the parts entering into the construction of thecooler, and without in any wise affecting, or interfering with, theoperation of the cooler.

A further object here sought is to simplify the construction so as toreduce the cost thereof, and minimize repairs.

The invention possesses further and other advantages which willbeapparent from a detailed description thereof, said description beingas follows:

Referring to the drawings, 1 represents an open-ended tube or drum ofboiler plate or equivalent material, mounted at a slight incline, thewalls of the drum having disposed thereon a series of annular trackbandsor rings 2, 2, resting on rollers 3, 3, supported on a suitablefoundation, the drum being further provided with an annular gear ring fmeshing with a pinion 5 on a shaft 6, the latter having rotationimparted thereto by any system of gears from a suitable source of power(not shown), whereby rotation is imparted to the drum about its axis.The features alluded to are well understood in the art, are shownconventionally, and no attempt is here made to enter into any detaileddescription thereof. Besides, the driving mechanism or gearing may bechanged to suit conditions, a matter wholly within the purview of theskilled mechanic.

In the present embodiment of my invention, I provide the tube or drum 1with an intake water-head 7 at the ore-discharge end, and with a similardischarge waterhead 7 at the ore-intake or feed end, the drum dippingfrom the ore-feed end toward the ore-discharge end. These water-headshave each an annular chamber C for the circulating medium (preferablywater) and are constructed in any suitable mechanical manner, butpreferably as shown, that is to say, the head 7 is composed of anannular plate a towhich is bolted an annular channel ring I), the head 7being composed of a somewhat similar annular plate a to which is boltedan annular channel ring I). The

chambers of the respective heads are connected by circulating pipes 8disposed about the surface of a cylinder, and close to the inner wallsof the shell of the drum as shown. At intermediate points the pipes passthrough the body portions of annular rings 9 secured by angle-pieces 10to the shell, said rings preventing sagging of the pipes and insuringstiffness therefor, though the pipes have free play in the openings ofthe rings through which they pass. The ore-feed end of the drum 1 isprovided with an annular head 11 secured in position by angle-brackets12 (or otherwise) the adjacent ends of the circulating pipes 8 passingfreely through the body portion of said head. Tapping the outer wall ofthe intake water-head 7 is a cluster of water-distributing pipes 13which radiate from a common supply-pipe 14 provided with an ordinarycut-off hand valve V, said pipe 14: leading from a stufiing box B ofconventional design, into which the main water-feed pipe P discharges.The pipe P and stuffing-box B are supposed to be fixed or stationary.The peripheral walls of the discharge head 7 are provided with openings0 through which the heated water (or other cooling medium) dischargesinto a launder (not shown) as well understood in the art, The chambersC, C, are made water-tight by suitable gaskets or packing rings 1, aconstruction well within the purview of the skilled mechanic.

The operation of the cooler may be described as follows: Rotation beingimparted to the drum or cylinder 1 at a speed comformable to the rate ofadvance the ore shall have through the cooler, the hot calcines as theyleave the roasting furnace are fed into the upper end of the drumthrough the opening of the WtttGF-IIGEIdI, the mass or charge graduallygravitating toward the discharge end and escaping in a cooled statethrough the opening of the annular waterhead 7, as fully indicated bythe arrows in Fig. 1. At the same time cold water (or its equivalent) iscaused to circulate from the supply pipe P, through'the distributingpipes 13, chamber of the head 7 circulating pipes 8, and chamber of thehead 7 the hot water finally making its escape through the openings 0 ofsaid discharge head 7 The Water thus circulates in one direction whilethe ore travels in the opposite direction. By the time the ore reachesthe discharge end of the drum it is cooled down to substantially thetemperature of the inflowing water, the outflowing hot water beingdischarged through the openings 0 of the head 7. The head 7 of the drum,being secured directly to the shell or tubular portion thereof, the head7 being in turn coupled to the circulating pipes 8 leading from the head7. The sliding fit of the pipes 8 through the rings 9 and terminal head11 secured to the shell of the drum allows the shell to freely expandand contract under variations of temperature, the space 8 (Fig. 2)between the end of the drum and head 7 being ample to allow for themaximum expansion to which the shell may be subjected. The rollers 3 bythe way are sufficiently wide to accord the rings or bands 2 thenecessary play thereover during the expansions and contractions of theshell, the width of the pinion 5 being suflicient to permit the pinionto remain permanently in engagement with the gear ring 4:.

It will be noticed that the present cooler may be considered a part isdevoid of the conventional water-jacket, such a construction beingobjectionable for the reason that a water-jacket necessitates twoconcentric walls whose joint stifiness interferes with the freeexpansion and contraction of the shell, and for the further reason thata jacket is liable to leak. It also means increased cost of constructionand increased quantity of material. In the present embodiment of myinvention I illustrate one cylindrical row of circulating tubes 8; butit is within the scope ofmy invention to provide one or more rows ofsuch pipes, and I do not wish to limit myself to a single row; neitherdo I wish to restrict myself to the precise mechanical details herepipes or 7 illustrated, as these may in a measure bedeparted fromwithout spirit of the invention.

Features shown but not alluded to are well understood in the art, andneed no description in the present connection. .Obviously, the inventionis not to be understood as limited to the cooling of ore, the termorecooler appropriate, and because the cooler was primarily designed fortreating from ore-roasting furnaces.

Having described my invention, what I claim is r 1. In combination witha vessel traversable by a charge of hot mat'erialand provided withintake and discharge means, means rigidly coupled .to one end of thevessel and interposed in the path of traverse of the material, forconducting a cooling medium through the vessel, the walls and theopposite end of the Vessel being free from the means traversed by thecooling medium, whereby the vessel is free to expand and contract undervariations in temperature.

2. In combination with a rotatable openended tube having a feed anddischarge end and traversable by a charge of hot material, a water-headat the discharge end of the tube, circulating pipes leading from andrigidly connected at one end to, said waterhead on the inside of thetube and free from the tube walls and from the feed end of the tube, thesaid pipes discharging at points adjacent to the feed end of the tube,the latter being free to expand and contract under variations oftemperaturewithout affecting the circulating pipes.

3. In combination with a rotatable openended tube having a feed anddischarge end and traversable by a charge of hot material, a chamberedmember at the discharge end of the tube, means for supplying a coolingmedium to the chamber of said member, circulating pipes leading from andrigidly connected at one end to, said chambered member 011 the inside ofthe tube and free from thg tube walls and from the feed end of the tu e,

being here employed because most hot calcines the said pipes dischargingat'points affecting the nature or adjacent to the feed end of the tube,the latter being free to expand and contract under variations oftemperature.

a. in combination with a rotatable tube traversed by a charge of hotmaterial and provided with an intake and discharge for said material, achambered member at the discharge end of the tube, means outside thetube for introducing a cooling medium into said chamber, cir ulatingpipes leading from the chamber on the inside of the tube, for conductingthe cooling medium to the opposite end of the tube, a chambered membercoupled to the discharge ends of the pipes and provided with dischargemeans, said last mentioned chambered member and the pipes being freefrom the walls of the tube whereby the latter may freely expand andcontract under variations in temperature.

5. In combination with a rotatable openended tube having a feed anddischarge end and traversable by a charge of hot material, a chamberedmember at the discharge end of the tube, means for supplying a coolingmedium to the chamber of said member, circulating pipes leading from andrigidly connected at one end to, said chambered member on the inside ofthe tube and free from the tube walls and from the feed end of the tube,a chambered member free from the feed end of the tube, into which saidcirculating pipes discharge, said last named chambered. member beingprovided with discharge means for the cooling medium, the tube beingfree to expand and contract under variations of temperature.

6. In combination with a rotatable openended tube traversable by hotmaterial to be cooled, an annular water-head secured to the tube at thedischarge end thereof, means outside the tube for introducing water inture, in presence distributed volume to said water-head, a series ofcirculating pipes leading from the water-head at points contiguous tothe inner walls of the tube, means on said walls for supporting andguiding said pipes, the pipes having a sliding fit in said supportingand guiding means, an annular head at the intake end of the tube, thedischarge ends of the circulating pipes passing loosely through andbeyond the body portion of said annular head, an annular dischargewater-head coupled to the projecting ends of the pipes and receiving thedischarges therefrom, and provided with peripheral discharge openingsfor the hot water, the discharge water-head being spaced a suitabledistance from the adjacent end of the tube, and disconnected therefrom,whereby the tube is free to expand and contract under variations intemperature.

7. In combination with an open ended vessel traversable by a charge ofhot material and provided with intake and discharge openings for saidmaterial, means rigidly coupled to the vessel at the discharge end forthe material and leading from said dis charge end to the intake end forconducting a cooling medium through the vessel during the traverse ofthe hot material therethrough, said conducting means being free from thewalls and from the intake end of the vessel whereby the latter mayfreely respend to changes in temperature, and means for discharging thecooling medium at points contiguous to the intake end of the vessel.

In testimony whereof I flfi lX my signaof two witnesses. FREDERICKLAIST.

Witnesses lV. H. SHEERIN, ALBERT E. WVIGGIN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

